<!DOCTYPE html>
<meta charset="utf-8">
<title>
  Forced colors mode - active selection reference.
</title>
<style>
  span {
    background-color: Highlight;
    color: HighlightText;
    display: inline-block;
    forced-color-adjust: none;
  }
  #adjust-none {
    background-color: rgba(255, 0, 0, 0.99);
    color: blue;
  }
</style>
<body>
  <span class="select" id="adjust-none">AAA</span>
  <br>
  <span class="select">AAA</span>
</body>
